package day02;

public class VarDemo {
    public static void main(String[] args) {
        int a,b,c,d;
        a=1;
        a=3;
        b=2;
        int e=1,f=2,g=3,h=4;

        int m=a+2;//被用过的变量会变成黑色

        int balance =5000;
        balance =balance+1000;
        System.out.println(balance);
        balance= balance-2000;
        System.out.println(balance);


        int age;//命名法：英文的见名知义
        int myScore;//长名字:小驼峰命名法
    }
}
